3results about How to "Large pitch" patented technology

The present application relates to a kind of polymerization device of high viscosity polymer, belong to polymerization reaction device technical field.The present application includes reaction main body, with reaction inner cavity, reaction inner cavity is equipped with even root for stirring high viscosity polymer's helical stirring shaft, helical stirring shaft includes main shaft and the helical blade connected in the outer side of main shaft, and the helical blade in each adjacent two helical stirring shafts is staggered with each other on the side of mutual approach;Main shaft is equipped with the heat-conducting medium passage that is penetrated from top to bottom, and the heat-conducting medium passage in each main shaft is connected by connecting short pipe to be connected to be the serpentine heat-conducting medium circulation total passage, one end of heat-conducting medium circulation total passage is heat-conducting medium inlet, and the other end is heat-conducting medium outlet, and heat-conducting medium inlet and heat-conducting medium outlet are located in the same end of the reaction main body;Reaction main body outer side is equipped with heating box, and heating box is used to heat heat-conducting medium, and heating box is located in the side close to heat-conducting medium inlet and heat-conducting medium outlet.

The utility model relates to the technical field of household appliance equipment, in particular to a heat exchange fin, a combustion heat exchange assembly and a gas water heater, the heat exchange fin comprises a fin body, the fin body comprises a first body extending transversely and a second body arranged at one end of the first body and extending obliquely; the first body and the second body are each provided with a pipe inserting hole allowing a heat exchange pipeline to be inserted therein. The first body is provided with at least two pipe inserting holes which are arranged at intervals in the transverse direction, one side face of the first body is provided with a protruding smoke blocking structure, the smoke blocking structure is arranged in the middle area of the two pipe inserting holes, and the smoke blocking structure comprises a first smoke blocking part, a second smoke blocking part and a third smoke blocking part which are sequentially arranged at intervals from bottom to top; in the direction from bottom to top, the width sizes of the first smoke blocking part, the second smoke blocking part and the third smoke blocking part are gradually increased. According to the fin capable of improving the heat exchange effect, the combustion heat exchange assembly which is provided with the fin and capable of improving the heating effect and the gas water heater are formed.

This invention discloses a porous personalized implant and its manufacturing method. The porous personalized implant includes an abutment and an implant body. The abutment is disposed on top of the implant body and connected to it via a neck. A threaded, porous layer is formed directly on the outer surface of the implant body. The porous layer is helical and has a non-uniform curved surface structure, resulting in an uneven surface. A porous support region is also provided on the outer surface of the neck, passing through the neck and communicating with the porous layer on the outer surface of the implant body. The porous personalized implant of this invention is integrally molded. The porous structure adopts the G-surface structure of the three-period minimal surface, solving the stress shielding and stress concentration problems of existing dental implants. Furthermore, it shortens the surgical cycle while reducing damage to the surface treatment layer during implantation, improving the osseointegration performance of the implant and meeting the needs of different patients.